 I've never seen any of those either. But it says right here, this is an article from The Hill, ultra-rare $500 banknote from the 1930s to be auctioned off. It was actually, I think on Wednesday it was auctioned off. A rare $500 banknote from the 1930s is set to be auctioned off on Wednesday, according to Hansen's auctioneers. The banknote was printed 90 years ago as part of a major collection of rare USA notes uncovered in Wales.